Thomas Bnot Ratedke Dam No.1 Reservoir Report
Nearby: Johnson Bros 1 Hoover Dam
Last Updated: December 6, 2025
Located in Butte, South Dakota, Thomas Bnot Ratedke Dam No.1 is a privately owned structure with a low hazard potential.
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Summary
Constructed in 1948, this Earth-type dam stands at a height of 20 feet and has a storage capacity of 130 acre-feet. With a normal storage level of 70 acre-feet, the dam serves the purpose of regulating the flow of the Stony Basin Draw river or stream.
Managed by the Natural Resources Conservation Service, Thomas Bnot Ratedke Dam No.1 is regulated by the South Dakota Department of Environment and Natural Resources. It undergoes regular state inspections, with state permitting and enforcement in place to ensure its safety. Despite being not rated for its condition assessment, the dam has a low hazard potential, indicating a relatively low risk associated with its operation.
This dam plays a crucial role in water resource management in the area, providing valuable storage and regulation capabilities. Water resource and climate enthusiasts will appreciate the strategic location of Thomas Bnot Ratedke Dam No.1 and its contribution to the local ecosystem. With its historical significance and continued operational importance, this dam serves as a key infrastructure for sustainable water management in South Dakota.
Year Completed |
1948 |
Dam Length |
1790 |
Dam Height |
20 |
River Or Stream |
STONY BASIN DRAW |
Primary Dam Type |
Earth |
Hydraulic Height |
20 |
Nid Storage |
130 |
Hazard Potential |
Low |
Nid Height |
20 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Thomas Bnot Ratedke Dam No.1